Storage furnace



June 24, 1941.

M. MELA STORAGE FURNACE Filed Oct. 13, 1939 awe/whom M14777 MELAPatented June 24, 1941 UNITED STATES PATENT OFFICE STORAGE FURNACE MattiMela, Miami Beach, Fla.

Application October 13, 1939, Serial No. 299,378

1 Claim.

The present invention is directed to improvements in hot air storagefurnaces.

The primary object of the invention is to provide a furnace of this typeso constructed that the heat generated from the fuel will be stored andthen dissipated for heating purposes for a considerable time from a fireof short duration.

Another object of the invention is to provide a furnace of the storagetype wherein the fire-box and lines are so formed and mounted within themain casing as to generate a maximum heat with a minimum fuelconsumption.

Another object of the invention is to provide a furnace so constructedthat a large volume of heat absorbing and retaining material iscontained Within the main casing of the furnace and about the fire-boxand fiues inorder that the heat generated in the fire-box and flues willbe transmitted to the material and radiated therefrom during periodswhen the fire is at maximum or minimum heat, or in instances where quickburning fuel, such as wood, has been fully consumed.

Still another object of the invention is to provide a furnace whereinample fresh air will be admitted to the casing and caused to travelabout the material in a circuitous path to assure thorough heatingthereof as it passes into the heat discharge pipes.

With these and other objects in view, this invention resides in thenovel features of construction, formation, combination and arrangementof parts to be hereinafter more fully described,

. claimed and illustrated in the accompanying drawing, in which Figure 1is a front elevation, partly in section.

Figure 2 is a vertical central sectional view.

Referring to the drawing, 1 designates the main casing, the Walls ofwhich are of the hollow type and in order that suitable insulatingmaterial 2 may be contained therein.

Mounted within the casing l is a fire-box formed from suitable sheetmetal which is provided with the usual grate bars 4, the shaking rod 5thereof being pivoted to a hand lever 6 pivotally mounted, as at I, tothe casing I.

The front Wall of the casing I is provided with a fire door 8 and ashpit door 9, as is customary.

It will be observed that the side walls and the rear wall of thefire-box are spaced from the casing walls, the purpose of which willlater appear.

Having its forward end fixed to and communicating with the combustionchamber of the firebox 3 is a flue It, said flue being substantially thesame width as the fire-box and inclined rearwardly and upwardly. Thisflue discharges the products of combustion into a smoke stack (notshown).

A pair of heat conducting pipes H are shown, but it will be of courseunderstood that the number may be increased if desired.

Within the casing l and surrounding the firebox and flue is the heatabsorbing and storage material, in this instance hard stones 12 of asize to not pack too closely, but such that the fresh air may passfreely in its upward travel to be heated and discharged from the pipesll into the space to be heated.

In order to retain the stones spaced from the bottom of the furnacecasing l a grid or the like I3 is provided which extends about the sidesand rear end of the fire-box, and due to this grid formation fresh airentering the base of the casing will flow freely upwardly for contactwith the heated stones.

The side Walls of the casing I are formed with fresh air inlets l4,preferably arranged one adjacent each corner of the casing.

The front wall of the fire-box has a depending wall IS in which isformed a draft opening It, the admission of air therethrough beingcontrolled by the damper ll, the controlling rod 18 of which extendsthrough the front wall of the casing for convenient operation.

Formed in the rear wall of the casing is an opening I9 for use whenadditional air supply is desired, the same being normally closed by adoor 20.

To prevent distortion to the furnace Walls due to the Weight of the heatstoring material brace rods 2| are employed.

Since the stones surround the fire-box and flue It all heat radiatedtherefrom will be absorbed by the stones and dissipated therefrom intothe air pas-sing upwardly in the casing. Thus it will be seen that aslong as the stones contain heat to an appreciable extent the air passingthrough the casing will be heated before discharging into the pipes II,

From the foregoing it will be seen that a furnace has been providedwhich is simple in construction, durable, efficient in operation, andone which can be manufactured at a small cost.

What is claimed is:

A storage furnace comprising a casing, heat conducting tubescommunicating therewith, a fire-box within the casing and having anupwardly inclined flue communicating with the forward end thereof anddischarging the products of combustion from the fire-box through therear wall of the casing, said flue being substantially the same width asthe fire-box, and extending the full length thereof, said fire-box andflue bein spaced from the walls of the casing, a grid in the spacebetween said walls and fire-box, said casing having air openings thereincommuni-

